It is kept safe in the dwarven libraries located at Mount Velik. One of the book's prophecies states that the emperor would be killed by a white dragon and his rider. Each race of Durn has its own books of revelation, and this same prophecy exists in all of them. Emperor Vosper did everything he could to prevent this from coming true, which included attempts to burn all of the prophetic books. He was able to burn the libraries at Aonach Tower, but he could do nothing to touch the dwarven libraries.